Said c



2 Sheets--Sheet L.

s. w.-,& c. P HOWELL. Metal-creasing Machine.

Patented Jan.'26

aw w W w Z UNITED STATES PATENT OFFICE GEORGE W. HOWELL-AND CHARLES P. HOWELL, 0F Govmeromirnnrucnr;

SAID- c. P. HOWELL Assrcnon TO GEORGE w.-Hown L. i

' IMP-RO YEMENT iiN METAL CREASWG MAQHlNESn To all whom itmay concern:

Be it known that we, GEORGE W. HOWELL- an'd CHARLES. P. HOWELL, of (lovington, in the countyof .gKento n-and State of Kentucky, haveinvented certain new and useful Improvements-in Machines for Forming Greases in Metahof which the following is a specificawhile both revolve eecentrically to the metal blank to becreased. The semicircular sheets of metal are held by suitable mechanism while 5 thesame are being creased. The creases in i the metal blank are made between two linked jaws; arranged to move on two centers. The metal blank is embraced upon its inner and outer periphery by a yoke, consisting of two semicircular leaves, whereby the semicircular form' of the blank is maintained whileabeiug fed into the machine;

The invention consists of certain other censtruction and combination of parts, all of which will be fully hereinafter described.

- Figure l-is' aside elevation of a machine p embodying our invention,'-and Fig. 2 a plan of the same. Fig. 3 is an elevation of the right end of Fig, 1. The other figures illustrate. parts of the machine in detail,-'and will be more fully'described hereafter.

The machine may be mountedon any suitable fi'am'e, which :is here represented by A, having journal-brackets B B for the shaft D to revolve upon. D is the main shaft, upon which are mounted the driving-spur I, feedin cam J, and former d.

- n order that the former d may be adjusted so as to form creases of various depths, the

journal-bearing D is made adjustable, and to accommodate changed-positions of this hear? ing the shaft D is provided withv joints but when the "depth of creasedesired is ascerfiinemnnd-lthe journal 1), made to suit the formation of such creases, it is evident that the joints in the shaft may be dispensed with.-

the former d.

Specification forming are-or Letters Patent No. 159,096, dated January26,18 75; ma ia filed 1' Q November 7, 1874.

The manner of attaching the former. to the mainshaft is clearly shown in Fig. 7, where I the pipe to beformed, and thisfor the reason that the strain on thepipe. metal, while the crease is beingformem'is very much less,being more distributed than it would'be if a much smaller-wh eel were emplgyed, and hence inferior metal can be used. When the diam eter of the former is ascertained, the depth of -.the crease to be formedwill depend on the cocentricity of the driving-shaft D to the metal blank or circuline slot 2, and its width and shape will conform to that of the periphery of E E are plates supporting the hinged jaws y y. Our construction being to make the inner one, E, rigid, with a fixed bearing for the sh aft D, an adjustable journal-box may be used in addition thereto, as shown at D, Fig. 8, The outer plate, E, is hinged to E, as shown in Figs. 2 and 10, and opens and closes as the creases are successively formed in the metal.

Oirculine slots 2 are cut in plates E E, as shown in Fig. 8, of sufficient depth in- E to allow the sheet metal to feed to the former,

and in E to allow the same, after the corrugation has been formed,'to pass through. c

is a swage-block, formed. in the plates by the slot z, and is circuline, and of the size of the pipe to be made. Between the platesE E,

and attached to them, are two jaw-s, y y, which act as dies, between which the creases inthemetal are made by the revolvin'g for'merd, to conform to the shape-of their interior surfaces, which should be 'circulilie. They mare operated by the leverR, which is provided with an axle, earrying two frictionrollers, 2 10, working in the cam-grooves q q of pulleys P P, Figs. 1 and 5. .To the crosshead ofuR is rigidly attached ail-extensionrod,'R, the upper end ofwhich is-attac'hed to the jaw y bya pivot which plays in. slot- 4* of plate E,-Fig. 8.- To the opposite end of .said cross-head is loosely attached,'in any suit able manner which will admit of aside more? strain, is also shown.

ment'of plate E. another extension-rod, R which is attachedto jaw 31 in a similar manner to that of R toy. As the cam-pulleys l? 1?,

7 blank inposition during the operation, a groove may be provided in the outer jaw, 3 as shown in plan, Fig. 11, in which the first corrugation rests while thesecond is being formed, andso on successively. -Ifdesired or found necessary, the number of such grooves may be mcreased, so as to rest several corrugations at the same time; and in'order the more freely and quickly to release the metal, the jaws 3 y are hinged and move on two centers, as shown in Figs. 8 and 11. Parts 1 and 2 are pivoted together at 4, part 1 having 5 for a center, where it is pivoted to the plate next'to it, and part 2 being loosely connected to link 3 at 6, which link'is pivoted at 7.

By this arrangement the pivoted ends of the jaws will be allowed to drop a sufficient distance to free the metal immediately after the formation of each crease. 4

/It is necessary that the lever B should move in very nearly the same vertical plane, and to secure this it is connected to the rear of the frame. by a rod, 0, loosely attached at both ends, or a slotted frame may be provided for B to play through.

Wis a bellerank, having a pivoted fulcrum,

w, and its upper arm connected to plate E by the rod V,rod V being attached to its lower arm,'and being provided with an axle on its lower end, which carries frictionrollers Q,

working in cam-grooves Q of pulleys O 0,

Figs. 1 and 4. 1 Rod V and-its friction-rollers areheld in their proper vertical plane by a rod, 0, loosely attached to said mile at one. end, and to the side frame of the machine at the other end. The arms of the bell-crank are slotted, so as to admit of an adjustment of the connecting-rods-to vary the play of plate E, which, by the movement ofcarh-pulleys O 0, said rods, and cranks, is opened to release the metal after acrease is formed, and is closed in forming each crease, so as to cause the metal to'bebroughtto fit the former d, which may be of any desired shape or-thickness. These plates E E and jaws y y are represented'open in a plan view, Fig. 10, where a friction-roller, e, which runs under the frame to prevent the plate from rising and to relieve the hinge from The same plates are shown closed in a cross-section on the plane of the shaft D in Fig.9.

Theffirst view in Fig. 6 is aside view, and the. seconda plan of a yoke employed to shape the metal blank, preserve its circulinity, and

feed it into the machine. This yoke is attachedto the forward end of. ratchet H, which is operated bya pawl, h, pivoted to a carriage, K, which has adouble-beveled slot on its upper face,,through which'a nosed cam J, on shaft D revolves, and with each revolution advances the yoke one notch as the nose -18 passing through the slot, the carriage being immedv "ately afterward carried back and firmly held in position by the flat partof the cam, while,

at the same time, the pawl engages the next rearward notch of the ratchet.

The metal to be creased is placed with one .end within the leaves b b of yoke G, and the other projecting a sufiicient distance through slot 2 to allow the formation of the first crease. The hinged lever 12? is th'enclosed over the end of b, which causes it to. press the metal blank closely against 1), and to so firmly clasp it that it will be fed to the former by the described movement of the ratchet.

The machine is so adjusted metal, and feeds it forward a sufficient distance to form the next successive crease.

Pulleys P P may be so constructed, by shaping the cam-grooves on their inner faces, and so adjusted, as to have the dies or jaws yy engage the metal and release the same at any desired point of the revolution of .the former d,- and the pulleys O O, with their cam-grooves, may likewise be so constructed and adjusted as to open and close the hingedplate E at any desired point of the revolution of said former d by obvious mechanical changes and adjustments.

The following isthe mode of operation when adjusted: One or more pieces of metal bent in the form of a half-cylinder are placed with one end in slot ,2 and the other in yoke G, with the concaveportion fittingthe-swageblock 6. The machine being driven by any" suitable power applied to pulley L, shafts D and S revolve. Jaws y y, are carried up to clasp the metal and hold it firmly against said swage block. The former d forms a crease in the metal between the jaws y y almost entirely around (and all the way, if de sired)'the curved .metal', and whichcrease. should be very slight on one side,'and about three-eighths of an inch in depth upon the op" posite edge, when it is intended to'be used "for stove-pipe elbows, but may be any other depth desired, or similar to those shown in Letters Patent No. 121,104, granted to said George W. Howell, November 21, 1871.

Pulleys O O are so regulatedthat the dies y y commence. to close while the formeris in the crease, and continue closing as it revolves,

the degree of proximity depending on adjustment of crank, 860, v

. As soon as one 'crease is formed, the jaws or dies drop, the plate Eopens, and the metal blank is moved forward, as before described, ready to form'another crease.

' a is a lever, pivoted at a, and havinga. it

rod-connection, m, with an eye,-m through which the driving-belt passes.

that a single revolution of shaft D forms one crease in the After the last crease has been formed, the

"'iyoke G strikes against the inner end of lever n, and carries it forward, by which movement the belt is shifted from the driving-pulley L to a loose pulley, L, and the lever is carriedvover a sp'ring, S', which holds it back until the next blank is placed in position, when the belt is replaced on the driving-pulley. by a movement of handle m What we claim as our invention, and desire to secure by Letters Patent, is-

1. The former d, having an axle-bearing on the end of the driving-shaft D, with which it revolves concentrically, while both revolve eccentrically to the metal blank,- in combination withsnitable mechanism for holding semicircular sheets of metal'while the same are being creased, substantially as described.

2. The linked jaws y arranged to move on two centers, substantially as and for the purpose described, in combination with suitable mechanism for creasin semicircular sheets of metal between their surfaces.

3. The combination of plates E E, jaws-y y, and former d, adapted to form cwvesarnh creasesin sheet metal for pipe-elbows, all sub etantially as hereinsetforth.

' 41"Jaws try, in combination with the pul leys and levers described, for operating the same automatically, substantially as herein set forth. v

5. Plates E E, in combination with the pulleys, crank, and rods described, for automatically operating the same, as specified.

6.. The nosed cam J, in combination with carriage K, pawl h, .and ratchet -H, substam gallly as described, and for the purpose speci- 7. Ina pipe-elbow metal-creasing machine,

the yoke G, having two hingedsemicircular leaves, 6 b adapted to embrace the metal blank on'its inner and outer peripheries, and thereby preserve its circulinity-whilefeeding "it into the machine, substantially as shown 

